1 /* 2 * Copyright (c) 2000-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include "xfs.h" 20 #include "xfs_format.h" 21 #include "xfs_log.h" 22 #include "xfs_inum.h" 23 #include "xfs_trans.h" 24 #include "xfs_sb.h" 25 #include "xfs_ag.h" 26 #include "xfs_alloc.h" 27 #include "xfs_quota.h" 28 #include "xfs_mount.h" 29 #include "xfs_bmap_btree.h" 30 #include "xfs_alloc_btree.h" 31 #include "xfs_ialloc_btree.h" 32 #include "xfs_dinode.h" 33 #include "xfs_inode.h" 34 #include "xfs_btree.h" 35 #include "xfs_ialloc.h" 36 #include "xfs_bmap.h" 37 #include "xfs_rtalloc.h" 38 #include "xfs_error.h" 39 #include "xfs_itable.h" 40 #include "xfs_fsops.h" 41 #include "xfs_attr.h" 42 #include "xfs_buf_item.h" 43 #include "xfs_log_priv.h" 44 #include "xfs_trans_priv.h" 45 #include "xfs_filestream.h" 46 #include "xfs_da_btree.h" 47 #include "xfs_dir2_format.h" 48 #include "xfs_dir2.h" 49 #include "xfs_extfree_item.h" 50 #include "xfs_mru_cache.h" 51 #include "xfs_inode_item.h" 52 #include "xfs_icache.h" 53 #include "xfs_trace.h" 54 #include "xfs_icreate_item.h" 55 56 #include <linux/namei.h> 57 #include <linux/init.h> 58 #include <linux/slab.h> 59 #include <linux/mount.h> 60 #include <linux/mempool.h> 61 #include <linux/writeback.h> 62 #include <linux/kthread.h> 63 #include <linux/freezer.h> 64 #include <linux/parser.h> 65 66 static const struct super_operations xfs_super_operations; 67 static kmem_zone_t *xfs_ioend_zone; 68 mempool_t *xfs_ioend_pool; 69 70 #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ 71 #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ 72 #define MNTOPT_LOGDEV "logdev" /* log device */ 73 #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ 74 #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ 75 #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ 76 #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ 77 #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ 78 #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ 79 #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ 80 #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ 81 #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ 82 #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ 83 #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ 84 #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ 85 #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ 86 #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ 87 #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ 88 #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and 89 * unwritten extent conversion */ 90 #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ 91 #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ 92 #define MNTOPT_32BITINODE "inode32" /* inode allocation limited to 93 * XFS_MAXINUMBER_32 */ 94 #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ 95 #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ 96 #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ 97 #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes 98 * in stat(). */ 99 #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ 100 #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ 101 #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ 102 #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ 103 #define MNTOPT_NOQUOTA "noquota" /* no quotas */ 104 #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ 105 #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ 106 #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ 107 #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ 108 #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ 109 #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ 110 #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ 111 #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ 112 #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ 113 #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ 114 #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ 115 #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ 116 #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ 117 #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ 118 119 /* 120 * Table driven mount option parser. 121 * 122 * Currently only used for remount, but it will be used for mount 123 * in the future, too. 124 */ 125 enum { 126 Opt_barrier, 127 Opt_nobarrier, 128 Opt_inode64, 129 Opt_inode32, 130 Opt_err 131 }; 132 133 static const match_table_t tokens = { 134 {Opt_barrier, "barrier"}, 135 {Opt_nobarrier, "nobarrier"}, 136 {Opt_inode64, "inode64"}, 137 {Opt_inode32, "inode32"}, 138 {Opt_err, NULL} 139 }; 140 141 142 STATIC unsigned long 143 suffix_kstrtoint(char *s, unsigned int base, int *res) 144 { 145 int last, shift_left_factor = 0, _res; 146 char *value = s; 147 148 last = strlen(value) - 1; 149 if (value[last] == 'K' || value[last] == 'k') { 150 shift_left_factor = 10; 151 value[last] = '\0'; 152 } 153 if (value[last] == 'M' || value[last] == 'm') { 154 shift_left_factor = 20; 155 value[last] = '\0'; 156 } 157 if (value[last] == 'G' || value[last] == 'g') { 158 shift_left_factor = 30; 159 value[last] = '\0'; 160 } 161 162 if (kstrtoint(s, base, &_res)) 163 return -EINVAL; 164 *res = _res << shift_left_factor; 165 return 0; 166 } 167 168 /* 169 * This function fills in xfs_mount_t fields based on mount args. 170 * Note: the superblock has _not_ yet been read in. 171 * 172 * Note that this function leaks the various device name allocations on 173 * failure. The caller takes care of them. 174 */ 175 STATIC int 176 xfs_parseargs( 177 struct xfs_mount *mp, 178 char *options) 179 { 180 struct super_block *sb = mp->m_super; 181 char *this_char, *value; 182 int dsunit = 0; 183 int dswidth = 0; 184 int iosize = 0; 185 __uint8_t iosizelog = 0; 186 187 /* 188 * set up the mount name first so all the errors will refer to the 189 * correct device. 190 */ 191 mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); 192 if (!mp->m_fsname) 193 return ENOMEM; 194 mp->m_fsname_len = strlen(mp->m_fsname) + 1; 195 196 /* 197 * Copy binary VFS mount flags we are interested in. 198 */ 199 if (sb->s_flags & MS_RDONLY) 200 mp->m_flags |= XFS_MOUNT_RDONLY; 201 if (sb->s_flags & MS_DIRSYNC) 202 mp->m_flags |= XFS_MOUNT_DIRSYNC; 203 if (sb->s_flags & MS_SYNCHRONOUS) 204 mp->m_flags |= XFS_MOUNT_WSYNC; 205 206 /* 207 * Set some default flags that could be cleared by the mount option 208 * parsing. 209 */ 210 mp->m_flags |= XFS_MOUNT_BARRIER; 211 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 212 #if !XFS_BIG_INUMS 213 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 214 #endif 215 216 /* 217 * These can be overridden by the mount option parsing. 218 */ 219 mp->m_logbufs = -1; 220 mp->m_logbsize = -1; 221 222 if (!options) 223 goto done; 224 225 while ((this_char = strsep(&options, ",")) != NULL) { 226 if (!*this_char) 227 continue; 228 if ((value = strchr(this_char, '=')) != NULL) 229 *value++ = 0; 230 231 if (!strcmp(this_char, MNTOPT_LOGBUFS)) { 232 if (!value || !*value) { 233 xfs_warn(mp, "%s option requires an argument", 234 this_char); 235 return EINVAL; 236 } 237 if (kstrtoint(value, 10, &mp->m_logbufs)) 238 return EINVAL; 239 } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { 240 if (!value || !*value) { 241 xfs_warn(mp, "%s option requires an argument", 242 this_char); 243 return EINVAL; 244 } 245 if (suffix_kstrtoint(value, 10, &mp->m_logbsize)) 246 return EINVAL; 247 } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { 248 if (!value || !*value) { 249 xfs_warn(mp, "%s option requires an argument", 250 this_char); 251 return EINVAL; 252 } 253 mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 254 if (!mp->m_logname) 255 return ENOMEM; 256 } else if (!strcmp(this_char, MNTOPT_MTPT)) { 257 xfs_warn(mp, "%s option not allowed on this system", 258 this_char); 259 return EINVAL; 260 } else if (!strcmp(this_char, MNTOPT_RTDEV)) { 261 if (!value || !*value) { 262 xfs_warn(mp, "%s option requires an argument", 263 this_char); 264 return EINVAL; 265 } 266 mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); 267 if (!mp->m_rtname) 268 return ENOMEM; 269 } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { 270 if (!value || !*value) { 271 xfs_warn(mp, "%s option requires an argument", 272 this_char); 273 return EINVAL; 274 } 275 if (kstrtoint(value, 10, &iosize)) 276 return EINVAL; 277 iosizelog = ffs(iosize) - 1; 278 } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { 279 if (!value || !*value) { 280 xfs_warn(mp, "%s option requires an argument", 281 this_char); 282 return EINVAL; 283 } 284 if (suffix_kstrtoint(value, 10, &iosize)) 285 return EINVAL; 286 iosizelog = ffs(iosize) - 1; 287 } else if (!strcmp(this_char, MNTOPT_GRPID) || 288 !strcmp(this_char, MNTOPT_BSDGROUPS)) { 289 mp->m_flags |= XFS_MOUNT_GRPID; 290 } else if (!strcmp(this_char, MNTOPT_NOGRPID) || 291 !strcmp(this_char, MNTOPT_SYSVGROUPS)) { 292 mp->m_flags &= ~XFS_MOUNT_GRPID; 293 } else if (!strcmp(this_char, MNTOPT_WSYNC)) { 294 mp->m_flags |= XFS_MOUNT_WSYNC; 295 } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { 296 mp->m_flags |= XFS_MOUNT_NORECOVERY; 297 } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { 298 mp->m_flags |= XFS_MOUNT_NOALIGN; 299 } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { 300 mp->m_flags |= XFS_MOUNT_SWALLOC; 301 } else if (!strcmp(this_char, MNTOPT_SUNIT)) { 302 if (!value || !*value) { 303 xfs_warn(mp, "%s option requires an argument", 304 this_char); 305 return EINVAL; 306 } 307 if (kstrtoint(value, 10, &dsunit)) 308 return EINVAL; 309 } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { 310 if (!value || !*value) { 311 xfs_warn(mp, "%s option requires an argument", 312 this_char); 313 return EINVAL; 314 } 315 if (kstrtoint(value, 10, &dswidth)) 316 return EINVAL; 317 } else if (!strcmp(this_char, MNTOPT_32BITINODE)) { 318 mp->m_flags |= XFS_MOUNT_SMALL_INUMS; 319 } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { 320 mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; 321 #if !XFS_BIG_INUMS 322 xfs_warn(mp, "%s option not allowed on this system", 323 this_char); 324 return EINVAL; 325 #endif 326 } else if (!strcmp(this_char, MNTOPT_NOUUID)) { 327 mp->m_flags |= XFS_MOUNT_NOUUID; 328 } else if (!strcmp(this_char, MNTOPT_BARRIER)) { 329 mp->m_flags |= XFS_MOUNT_BARRIER; 330 } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { 331 mp->m_flags &= ~XFS_MOUNT_BARRIER; 332 } else if (!strcmp(this_char, MNTOPT_IKEEP)) { 333 mp->m_flags |= XFS_MOUNT_IKEEP; 334 } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { 335 mp->m_flags &= ~XFS_MOUNT_IKEEP; 336 } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { 337 mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; 338 } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { 339 mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; 340 } else if (!strcmp(this_char, MNTOPT_ATTR2)) { 341 mp->m_flags |= XFS_MOUNT_ATTR2; 342 } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { 343 mp->m_flags &= ~XFS_MOUNT_ATTR2; 344 mp->m_flags |= XFS_MOUNT_NOATTR2; 345 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { 346 mp->m_flags |= XFS_MOUNT_FILESTREAMS; 347 } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { 348 mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; 349 mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; 350 mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; 351 } else if (!strcmp(this_char, MNTOPT_QUOTA) || 352 !strcmp(this_char, MNTOPT_UQUOTA) || 353 !strcmp(this_char, MNTOPT_USRQUOTA)) { 354 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | 355 XFS_UQUOTA_ENFD); 356 } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || 357 !strcmp(this_char, MNTOPT_UQUOTANOENF)) { 358 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); 359 mp->m_qflags &= ~XFS_UQUOTA_ENFD; 360 } else if (!strcmp(this_char, MNTOPT_PQUOTA) || 361 !strcmp(this_char, MNTOPT_PRJQUOTA)) { 362 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | 363 XFS_PQUOTA_ENFD); 364 } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { 365 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); 366 mp->m_qflags &= ~XFS_PQUOTA_ENFD; 367 } else if (!strcmp(this_char, MNTOPT_GQUOTA) || 368 !strcmp(this_char, MNTOPT_GRPQUOTA)) { 369 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | 370 XFS_GQUOTA_ENFD); 371 } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { 372 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); 373 mp->m_qflags &= ~XFS_GQUOTA_ENFD; 374 } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { 375 xfs_warn(mp, 376 "delaylog is the default now, option is deprecated."); 377 } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { 378 xfs_warn(mp, 379 "nodelaylog support has been removed, option is deprecated."); 380 } else if (!strcmp(this_char, MNTOPT_DISCARD)) { 381 mp->m_flags |= XFS_MOUNT_DISCARD; 382 } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { 383 mp->m_flags &= ~XFS_MOUNT_DISCARD; 384 } else if (!strcmp(this_char, "ihashsize")) { 385 xfs_warn(mp, 386 "ihashsize no longer used, option is deprecated."); 387 } else if (!strcmp(this_char, "osyncisdsync")) { 388 xfs_warn(mp, 389 "osyncisdsync has no effect, option is deprecated."); 390 } else if (!strcmp(this_char, "osyncisosync")) { 391 xfs_warn(mp, 392 "osyncisosync has no effect, option is deprecated."); 393 } else if (!strcmp(this_char, "irixsgid")) { 394 xfs_warn(mp, 395 "irixsgid is now a sysctl(2) variable, option is deprecated."); 396 } else { 397 xfs_warn(mp, "unknown mount option [%s].", this_char); 398 return EINVAL; 399 } 400 } 401 402 /* 403 * no recovery flag requires a read-only mount 404 */ 405 if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && 406 !(mp->m_flags & XFS_MOUNT_RDONLY)) { 407 xfs_warn(mp, "no-recovery mounts must be read-only."); 408 return EINVAL; 409 } 410 411 if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { 412 xfs_warn(mp, 413 "sunit and swidth options incompatible with the noalign option"); 414 return EINVAL; 415 } 416 417 #ifndef CONFIG_XFS_QUOTA 418 if (XFS_IS_QUOTA_RUNNING(mp)) { 419 xfs_warn(mp, "quota support not available in this kernel."); 420 return EINVAL; 421 } 422 #endif 423 424 if ((dsunit && !dswidth) || (!dsunit && dswidth)) { 425 xfs_warn(mp, "sunit and swidth must be specified together"); 426 return EINVAL; 427 } 428 429 if (dsunit && (dswidth % dsunit != 0)) { 430 xfs_warn(mp, 431 "stripe width (%d) must be a multiple of the stripe unit (%d)", 432 dswidth, dsunit); 433 return EINVAL; 434 } 435 436 done: 437 if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { 438 /* 439 * At this point the superblock has not been read 440 * in, therefore we do not know the block size. 441 * Before the mount call ends we will convert 442 * these to FSBs. 443 */ 444 mp->m_dalign = dsunit; 445 mp->m_swidth = dswidth; 446 } 447 448 if (mp->m_logbufs != -1 && 449 mp->m_logbufs != 0 && 450 (mp->m_logbufs < XLOG_MIN_ICLOGS || 451 mp->m_logbufs > XLOG_MAX_ICLOGS)) { 452 xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", 453 mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); 454 return XFS_ERROR(EINVAL); 455 } 456 if (mp->m_logbsize != -1 && 457 mp->m_logbsize != 0 && 458 (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || 459 mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || 460 !is_power_of_2(mp->m_logbsize))) { 461 xfs_warn(mp, 462 "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", 463 mp->m_logbsize); 464 return XFS_ERROR(EINVAL); 465 } 466 467 if (iosizelog) { 468 if (iosizelog > XFS_MAX_IO_LOG || 469 iosizelog < XFS_MIN_IO_LOG) { 470 xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", 471 iosizelog, XFS_MIN_IO_LOG, 472 XFS_MAX_IO_LOG); 473 return XFS_ERROR(EINVAL); 474 } 475 476 mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; 477 mp->m_readio_log = iosizelog; 478 mp->m_writeio_log = iosizelog; 479 } 480 481 return 0; 482 } 483 484 struct proc_xfs_info { 485 int flag; 486 char *str; 487 }; 488 489 STATIC int 490 xfs_showargs( 491 struct xfs_mount *mp, 492 struct seq_file *m) 493 { 494 static struct proc_xfs_info xfs_info_set[] = { 495 /* the few simple ones we can get from the mount struct */ 496 { XFS_MOUNT_IKEEP, "," MNTOPT_IKEEP }, 497 { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, 498 { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, 499 { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, 500 { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, 501 { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, 502 { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, 503 { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, 504 { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, 505 { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, 506 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_32BITINODE }, 507 { 0, NULL } 508 }; 509 static struct proc_xfs_info xfs_info_unset[] = { 510 /* the few simple ones we can get from the mount struct */ 511 { XFS_MOUNT_COMPAT_IOSIZE, "," MNTOPT_LARGEIO }, 512 { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, 513 { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, 514 { 0, NULL } 515 }; 516 struct proc_xfs_info *xfs_infop; 517 518 for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { 519 if (mp->m_flags & xfs_infop->flag) 520 seq_puts(m, xfs_infop->str); 521 } 522 for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { 523 if (!(mp->m_flags & xfs_infop->flag)) 524 seq_puts(m, xfs_infop->str); 525 } 526 527 if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) 528 seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", 529 (int)(1 << mp->m_writeio_log) >> 10); 530 531 if (mp->m_logbufs > 0) 532 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); 533 if (mp->m_logbsize > 0) 534 seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); 535 536 if (mp->m_logname) 537 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); 538 if (mp->m_rtname) 539 seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); 540 541 if (mp->m_dalign > 0) 542 seq_printf(m, "," MNTOPT_SUNIT "=%d", 543 (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); 544 if (mp->m_swidth > 0) 545 seq_printf(m, "," MNTOPT_SWIDTH "=%d", 546 (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); 547 548 if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) 549 seq_puts(m, "," MNTOPT_USRQUOTA); 550 else if (mp->m_qflags & XFS_UQUOTA_ACCT) 551 seq_puts(m, "," MNTOPT_UQUOTANOENF); 552 553 if (mp->m_qflags & XFS_PQUOTA_ACCT) { 554 if (mp->m_qflags & XFS_PQUOTA_ENFD) 555 seq_puts(m, "," MNTOPT_PRJQUOTA); 556 else 557 seq_puts(m, "," MNTOPT_PQUOTANOENF); 558 } 559 if (mp->m_qflags & XFS_GQUOTA_ACCT) { 560 if (mp->m_qflags & XFS_GQUOTA_ENFD) 561 seq_puts(m, "," MNTOPT_GRPQUOTA); 562 else 563 seq_puts(m, "," MNTOPT_GQUOTANOENF); 564 } 565 566 if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) 567 seq_puts(m, "," MNTOPT_NOQUOTA); 568 569 return 0; 570 } 571 __uint64_t 572 xfs_max_file_offset( 573 unsigned int blockshift) 574 { 575 unsigned int pagefactor = 1; 576 unsigned int bitshift = BITS_PER_LONG - 1; 577 578 /* Figure out maximum filesize, on Linux this can depend on 579 * the filesystem blocksize (on 32 bit platforms). 580 * __block_write_begin does this in an [unsigned] long... 581 * page->index << (PAGE_CACHE_SHIFT - bbits) 582 * So, for page sized blocks (4K on 32 bit platforms), 583 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is 584 * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) 585 * but for smaller blocksizes it is less (bbits = log2 bsize). 586 * Note1: get_block_t takes a long (implicit cast from above) 587 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch 588 * can optionally convert the [unsigned] long from above into 589 * an [unsigned] long long. 590 */ 591 592 #if BITS_PER_LONG == 32 593 # if defined(CONFIG_LBDAF) 594 ASSERT(sizeof(sector_t) == 8); 595 pagefactor = PAGE_CACHE_SIZE; 596 bitshift = BITS_PER_LONG; 597 # else 598 pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); 599 # endif 600 #endif 601 602 return (((__uint64_t)pagefactor) << bitshift) - 1; 603 } 604 605 xfs_agnumber_t 606 xfs_set_inode32(struct xfs_mount *mp) 607 { 608 xfs_agnumber_t index = 0; 609 xfs_agnumber_t maxagi = 0; 610 xfs_sb_t *sbp = &mp->m_sb; 611 xfs_agnumber_t max_metadata; 612 xfs_agino_t agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks -1, 0); 613 xfs_ino_t ino = XFS_AGINO_TO_INO(mp, sbp->sb_agcount -1, agino); 614 xfs_perag_t *pag; 615 616 /* Calculate how much should be reserved for inodes to meet 617 * the max inode percentage. 618 */ 619 if (mp->m_maxicount) { 620 __uint64_t icount; 621 622 icount = sbp->sb_dblocks * sbp->sb_imax_pct; 623 do_div(icount, 100); 624 icount += sbp->sb_agblocks - 1; 625 do_div(icount, sbp->sb_agblocks); 626 max_metadata = icount; 627 } else { 628 max_metadata = sbp->sb_agcount; 629 } 630 631 for (index = 0; index < sbp->sb_agcount; index++) { 632 ino = XFS_AGINO_TO_INO(mp, index, agino); 633 634 if (ino > XFS_MAXINUMBER_32) { 635 pag = xfs_perag_get(mp, index); 636 pag->pagi_inodeok = 0; 637 pag->pagf_metadata = 0; 638 xfs_perag_put(pag); 639 continue; 640 } 641 642 pag = xfs_perag_get(mp, index); 643 pag->pagi_inodeok = 1; 644 maxagi++; 645 if (index < max_metadata) 646 pag->pagf_metadata = 1; 647 xfs_perag_put(pag); 648 } 649 mp->m_flags |= (XFS_MOUNT_32BITINODES | 650 XFS_MOUNT_SMALL_INUMS); 651 652 return maxagi; 653 } 654 655 xfs_agnumber_t 656 xfs_set_inode64(struct xfs_mount *mp) 657 { 658 xfs_agnumber_t index = 0; 659 660 for (index = 0; index < mp->m_sb.sb_agcount; index++) { 661 struct xfs_perag *pag; 662 663 pag = xfs_perag_get(mp, index); 664 pag->pagi_inodeok = 1; 665 pag->pagf_metadata = 0; 666 xfs_perag_put(pag); 667 } 668 669 /* There is no need for lock protection on m_flags, 670 * the rw_semaphore of the VFS superblock is locked 671 * during mount/umount/remount operations, so this is 672 * enough to avoid concurency on the m_flags field 673 */ 674 mp->m_flags &= ~(XFS_MOUNT_32BITINODES | 675 XFS_MOUNT_SMALL_INUMS); 676 return index; 677 } 678 679 STATIC int 680 xfs_blkdev_get( 681 xfs_mount_t *mp, 682 const char *name, 683 struct block_device **bdevp) 684 { 685 int error = 0; 686 687 *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, 688 mp); 689 if (IS_ERR(*bdevp)) { 690 error = PTR_ERR(*bdevp); 691 xfs_warn(mp, "Invalid device [%s], error=%d\n", name, error); 692 } 693 694 return -error; 695 } 696 697 STATIC void 698 xfs_blkdev_put( 699 struct block_device *bdev) 700 { 701 if (bdev) 702 blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 703 } 704 705 void 706 xfs_blkdev_issue_flush( 707 xfs_buftarg_t *buftarg) 708 { 709 blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); 710 } 711 712 STATIC void 713 xfs_close_devices( 714 struct xfs_mount *mp) 715 { 716 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 717 struct block_device *logdev = mp->m_logdev_targp->bt_bdev; 718 xfs_free_buftarg(mp, mp->m_logdev_targp); 719 xfs_blkdev_put(logdev); 720 } 721 if (mp->m_rtdev_targp) { 722 struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; 723 xfs_free_buftarg(mp, mp->m_rtdev_targp); 724 xfs_blkdev_put(rtdev); 725 } 726 xfs_free_buftarg(mp, mp->m_ddev_targp); 727 } 728 729 /* 730 * The file system configurations are: 731 * (1) device (partition) with data and internal log 732 * (2) logical volume with data and log subvolumes. 733 * (3) logical volume with data, log, and realtime subvolumes. 734 * 735 * We only have to handle opening the log and realtime volumes here if 736 * they are present. The data subvolume has already been opened by 737 * get_sb_bdev() and is stored in sb->s_bdev. 738 */ 739 STATIC int 740 xfs_open_devices( 741 struct xfs_mount *mp) 742 { 743 struct block_device *ddev = mp->m_super->s_bdev; 744 struct block_device *logdev = NULL, *rtdev = NULL; 745 int error; 746 747 /* 748 * Open real time and log devices - order is important. 749 */ 750 if (mp->m_logname) { 751 error = xfs_blkdev_get(mp, mp->m_logname, &logdev); 752 if (error) 753 goto out; 754 } 755 756 if (mp->m_rtname) { 757 error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); 758 if (error) 759 goto out_close_logdev; 760 761 if (rtdev == ddev || rtdev == logdev) { 762 xfs_warn(mp, 763 "Cannot mount filesystem with identical rtdev and ddev/logdev."); 764 error = EINVAL; 765 goto out_close_rtdev; 766 } 767 } 768 769 /* 770 * Setup xfs_mount buffer target pointers 771 */ 772 error = ENOMEM; 773 mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, 0, mp->m_fsname); 774 if (!mp->m_ddev_targp) 775 goto out_close_rtdev; 776 777 if (rtdev) { 778 mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1, 779 mp->m_fsname); 780 if (!mp->m_rtdev_targp) 781 goto out_free_ddev_targ; 782 } 783 784 if (logdev && logdev != ddev) { 785 mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1, 786 mp->m_fsname); 787 if (!mp->m_logdev_targp) 788 goto out_free_rtdev_targ; 789 } else { 790 mp->m_logdev_targp = mp->m_ddev_targp; 791 } 792 793 return 0; 794 795 out_free_rtdev_targ: 796 if (mp->m_rtdev_targp) 797 xfs_free_buftarg(mp, mp->m_rtdev_targp); 798 out_free_ddev_targ: 799 xfs_free_buftarg(mp, mp->m_ddev_targp); 800 out_close_rtdev: 801 if (rtdev) 802 xfs_blkdev_put(rtdev); 803 out_close_logdev: 804 if (logdev && logdev != ddev) 805 xfs_blkdev_put(logdev); 806 out: 807 return error; 808 } 809 810 /* 811 * Setup xfs_mount buffer target pointers based on superblock 812 */ 813 STATIC int 814 xfs_setup_devices( 815 struct xfs_mount *mp) 816 { 817 int error; 818 819 error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize, 820 mp->m_sb.sb_sectsize); 821 if (error) 822 return error; 823 824 if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { 825 unsigned int log_sector_size = BBSIZE; 826 827 if (xfs_sb_version_hassector(&mp->m_sb)) 828 log_sector_size = mp->m_sb.sb_logsectsize; 829 error = xfs_setsize_buftarg(mp->m_logdev_targp, 830 mp->m_sb.sb_blocksize, 831 log_sector_size); 832 if (error) 833 return error; 834 } 835 if (mp->m_rtdev_targp) { 836 error = xfs_setsize_buftarg(mp->m_rtdev_targp, 837 mp->m_sb.sb_blocksize, 838 mp->m_sb.sb_sectsize); 839 if (error) 840 return error; 841 } 842 843 return 0; 844 } 845 846 STATIC int 847 xfs_init_mount_workqueues( 848 struct xfs_mount *mp) 849 { 850 mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", 851 WQ_MEM_RECLAIM, 0, mp->m_fsname); 852 if (!mp->m_data_workqueue) 853 goto out; 854 855 mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", 856 WQ_MEM_RECLAIM, 0, mp->m_fsname); 857 if (!mp->m_unwritten_workqueue) 858 goto out_destroy_data_iodone_queue; 859 860 mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", 861 WQ_MEM_RECLAIM, 0, mp->m_fsname); 862 if (!mp->m_cil_workqueue) 863 goto out_destroy_unwritten; 864 865 mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", 866 0, 0, mp->m_fsname); 867 if (!mp->m_reclaim_workqueue) 868 goto out_destroy_cil; 869 870 mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", 871 0, 0, mp->m_fsname); 872 if (!mp->m_log_workqueue) 873 goto out_destroy_reclaim; 874 875 mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", 876 0, 0, mp->m_fsname); 877 if (!mp->m_eofblocks_workqueue) 878 goto out_destroy_log; 879 880 return 0; 881 882 out_destroy_log: 883 destroy_workqueue(mp->m_log_workqueue); 884 out_destroy_reclaim: 885 destroy_workqueue(mp->m_reclaim_workqueue); 886 out_destroy_cil: 887 destroy_workqueue(mp->m_cil_workqueue); 888 out_destroy_unwritten: 889 destroy_workqueue(mp->m_unwritten_workqueue); 890 out_destroy_data_iodone_queue: 891 destroy_workqueue(mp->m_data_workqueue); 892 out: 893 return -ENOMEM; 894 } 895 896 STATIC void 897 xfs_destroy_mount_workqueues( 898 struct xfs_mount *mp) 899 { 900 destroy_workqueue(mp->m_eofblocks_workqueue); 901 destroy_workqueue(mp->m_log_workqueue); 902 destroy_workqueue(mp->m_reclaim_workqueue); 903 destroy_workqueue(mp->m_cil_workqueue); 904 destroy_workqueue(mp->m_data_workqueue); 905 destroy_workqueue(mp->m_unwritten_workqueue); 906 } 907 908 /* 909 * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK 910 * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting 911 * for IO to complete so that we effectively throttle multiple callers to the 912 * rate at which IO is completing. 913 */ 914 void 915 xfs_flush_inodes( 916 struct xfs_mount *mp) 917 { 918 struct super_block *sb = mp->m_super; 919 920 if (down_read_trylock(&sb->s_umount)) { 921 sync_inodes_sb(sb); 922 up_read(&sb->s_umount); 923 } 924 } 925 926 /* Catch misguided souls that try to use this interface on XFS */ 927 STATIC struct inode * 928 xfs_fs_alloc_inode( 929 struct super_block *sb) 930 { 931 BUG(); 932 return NULL; 933 } 934 935 /* 936 * Now that the generic code is guaranteed not to be accessing 937 * the linux inode, we can reclaim the inode. 938 */ 939 STATIC void 940 xfs_fs_destroy_inode( 941 struct inode *inode) 942 { 943 struct xfs_inode *ip = XFS_I(inode); 944 945 trace_xfs_destroy_inode(ip); 946 947 XFS_STATS_INC(vn_reclaim); 948 949 /* bad inode, get out here ASAP */ 950 if (is_bad_inode(inode)) 951 goto out_reclaim; 952 953 ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); 954 955 /* 956 * We should never get here with one of the reclaim flags already set. 957 */ 958 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); 959 ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); 960 961 /* 962 * We always use background reclaim here because even if the 963 * inode is clean, it still may be under IO and hence we have 964 * to take the flush lock. The background reclaim path handles 965 * this more efficiently than we can here, so simply let background 966 * reclaim tear down all inodes. 967 */ 968 out_reclaim: 969 xfs_inode_set_reclaim_tag(ip); 970 } 971 972 /* 973 * Slab object creation initialisation for the XFS inode. 974 * This covers only the idempotent fields in the XFS inode; 975 * all other fields need to be initialised on allocation 976 * from the slab. This avoids the need to repeatedly initialise 977 * fields in the xfs inode that left in the initialise state 978 * when freeing the inode. 979 */ 980 STATIC void 981 xfs_fs_inode_init_once( 982 void *inode) 983 { 984 struct xfs_inode *ip = inode; 985 986 memset(ip, 0, sizeof(struct xfs_inode)); 987 988 /* vfs inode */ 989 inode_init_once(VFS_I(ip)); 990 991 /* xfs inode */ 992 atomic_set(&ip->i_pincount, 0); 993 spin_lock_init(&ip->i_flags_lock); 994 995 mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, 996 "xfsino", ip->i_ino); 997 } 998 999 STATIC void 1000 xfs_fs_evict_inode( 1001 struct inode *inode) 1002 { 1003 xfs_inode_t *ip = XFS_I(inode); 1004 1005 ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); 1006 1007 trace_xfs_evict_inode(ip); 1008 1009 truncate_inode_pages(&inode->i_data, 0); 1010 clear_inode(inode); 1011 XFS_STATS_INC(vn_rele); 1012 XFS_STATS_INC(vn_remove); 1013 XFS_STATS_DEC(vn_active); 1014 1015 xfs_inactive(ip); 1016 } 1017 1018 /* 1019 * We do an unlocked check for XFS_IDONTCACHE here because we are already 1020 * serialised against cache hits here via the inode->i_lock and igrab() in 1021 * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be 1022 * racing with us, and it avoids needing to grab a spinlock here for every inode 1023 * we drop the final reference on. 1024 */ 1025 STATIC int 1026 xfs_fs_drop_inode( 1027 struct inode *inode) 1028 { 1029 struct xfs_inode *ip = XFS_I(inode); 1030 1031 return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); 1032 } 1033 1034 STATIC void 1035 xfs_free_fsname( 1036 struct xfs_mount *mp) 1037 { 1038 kfree(mp->m_fsname); 1039 kfree(mp->m_rtname); 1040 kfree(mp->m_logname); 1041 } 1042 1043 STATIC void 1044 xfs_fs_put_super( 1045 struct super_block *sb) 1046 { 1047 struct xfs_mount *mp = XFS_M(sb); 1048 1049 xfs_filestream_unmount(mp); 1050 xfs_unmountfs(mp); 1051 1052 xfs_freesb(mp); 1053 xfs_icsb_destroy_counters(mp); 1054 xfs_destroy_mount_workqueues(mp); 1055 xfs_close_devices(mp); 1056 xfs_free_fsname(mp); 1057 kfree(mp); 1058 } 1059 1060 STATIC int 1061 xfs_fs_sync_fs( 1062 struct super_block *sb, 1063 int wait) 1064 { 1065 struct xfs_mount *mp = XFS_M(sb); 1066 1067 /* 1068 * Doing anything during the async pass would be counterproductive. 1069 */ 1070 if (!wait) 1071 return 0; 1072 1073 xfs_log_force(mp, XFS_LOG_SYNC); 1074 if (laptop_mode) { 1075 /* 1076 * The disk must be active because we're syncing. 1077 * We schedule log work now (now that the disk is 1078 * active) instead of later (when it might not be). 1079 */ 1080 flush_delayed_work(&mp->m_log->l_work); 1081 } 1082 1083 return 0; 1084 } 1085 1086 STATIC int 1087 xfs_fs_statfs( 1088 struct dentry *dentry, 1089 struct kstatfs *statp) 1090 { 1091 struct xfs_mount *mp = XFS_M(dentry->d_sb); 1092 xfs_sb_t *sbp = &mp->m_sb; 1093 struct xfs_inode *ip = XFS_I(dentry->d_inode); 1094 __uint64_t fakeinos, id; 1095 xfs_extlen_t lsize; 1096 __int64_t ffree; 1097 1098 statp->f_type = XFS_SB_MAGIC; 1099 statp->f_namelen = MAXNAMELEN - 1; 1100 1101 id = huge_encode_dev(mp->m_ddev_targp->bt_dev); 1102 statp->f_fsid.val[0] = (u32)id; 1103 statp->f_fsid.val[1] = (u32)(id >> 32); 1104 1105 xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); 1106 1107 spin_lock(&mp->m_sb_lock); 1108 statp->f_bsize = sbp->sb_blocksize; 1109 lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; 1110 statp->f_blocks = sbp->sb_dblocks - lsize; 1111 statp->f_bfree = statp->f_bavail = 1112 sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); 1113 fakeinos = statp->f_bfree << sbp->sb_inopblog; 1114 statp->f_files = 1115 MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); 1116 if (mp->m_maxicount) 1117 statp->f_files = min_t(typeof(statp->f_files), 1118 statp->f_files, 1119 mp->m_maxicount); 1120 1121 /* make sure statp->f_ffree does not underflow */ 1122 ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); 1123 statp->f_ffree = max_t(__int64_t, ffree, 0); 1124 1125 spin_unlock(&mp->m_sb_lock); 1126 1127 if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && 1128 ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == 1129 (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) 1130 xfs_qm_statvfs(ip, statp); 1131 return 0; 1132 } 1133 1134 STATIC void 1135 xfs_save_resvblks(struct xfs_mount *mp) 1136 { 1137 __uint64_t resblks = 0; 1138 1139 mp->m_resblks_save = mp->m_resblks; 1140 xfs_reserve_blocks(mp, &resblks, NULL); 1141 } 1142 1143 STATIC void 1144 xfs_restore_resvblks(struct xfs_mount *mp) 1145 { 1146 __uint64_t resblks; 1147 1148 if (mp->m_resblks_save) { 1149 resblks = mp->m_resblks_save; 1150 mp->m_resblks_save = 0; 1151 } else 1152 resblks = xfs_default_resblks(mp); 1153 1154 xfs_reserve_blocks(mp, &resblks, NULL); 1155 } 1156 1157 /* 1158 * Trigger writeback of all the dirty metadata in the file system. 1159 * 1160 * This ensures that the metadata is written to their location on disk rather 1161 * than just existing in transactions in the log. This means after a quiesce 1162 * there is no log replay required to write the inodes to disk - this is the 1163 * primary difference between a sync and a quiesce. 1164 * 1165 * Note: xfs_log_quiesce() stops background log work - the callers must ensure 1166 * it is started again when appropriate. 1167 */ 1168 void 1169 xfs_quiesce_attr( 1170 struct xfs_mount *mp) 1171 { 1172 int error = 0; 1173 1174 /* wait for all modifications to complete */ 1175 while (atomic_read(&mp->m_active_trans) > 0) 1176 delay(100); 1177 1178 /* force the log to unpin objects from the now complete transactions */ 1179 xfs_log_force(mp, XFS_LOG_SYNC); 1180 1181 /* reclaim inodes to do any IO before the freeze completes */ 1182 xfs_reclaim_inodes(mp, 0); 1183 xfs_reclaim_inodes(mp, SYNC_WAIT); 1184 1185 /* Push the superblock and write an unmount record */ 1186 error = xfs_log_sbcount(mp); 1187 if (error) 1188 xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " 1189 "Frozen image may not be consistent."); 1190 /* 1191 * Just warn here till VFS can correctly support 1192 * read-only remount without racing. 1193 */ 1194 WARN_ON(atomic_read(&mp->m_active_trans) != 0); 1195 1196 xfs_log_quiesce(mp); 1197 } 1198 1199 STATIC int 1200 xfs_fs_remount( 1201 struct super_block *sb, 1202 int *flags, 1203 char *options) 1204 { 1205 struct xfs_mount *mp = XFS_M(sb); 1206 substring_t args[MAX_OPT_ARGS]; 1207 char *p; 1208 int error; 1209 1210 while ((p = strsep(&options, ",")) != NULL) { 1211 int token; 1212 1213 if (!*p) 1214 continue; 1215 1216 token = match_token(p, tokens, args); 1217 switch (token) { 1218 case Opt_barrier: 1219 mp->m_flags |= XFS_MOUNT_BARRIER; 1220 break; 1221 case Opt_nobarrier: 1222 mp->m_flags &= ~XFS_MOUNT_BARRIER; 1223 break; 1224 case Opt_inode64: 1225 mp->m_maxagi = xfs_set_inode64(mp); 1226 break; 1227 case Opt_inode32: 1228 mp->m_maxagi = xfs_set_inode32(mp); 1229 break; 1230 default: 1231 /* 1232 * Logically we would return an error here to prevent 1233 * users from believing they might have changed 1234 * mount options using remount which can't be changed. 1235 * 1236 * But unfortunately mount(8) adds all options from 1237 * mtab and fstab to the mount arguments in some cases 1238 * so we can't blindly reject options, but have to 1239 * check for each specified option if it actually 1240 * differs from the currently set option and only 1241 * reject it if that's the case. 1242 * 1243 * Until that is implemented we return success for 1244 * every remount request, and silently ignore all 1245 * options that we can't actually change. 1246 */ 1247 #if 0 1248 xfs_info(mp, 1249 "mount option \"%s\" not supported for remount\n", p); 1250 return -EINVAL; 1251 #else 1252 break; 1253 #endif 1254 } 1255 } 1256 1257 /* ro -> rw */ 1258 if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { 1259 mp->m_flags &= ~XFS_MOUNT_RDONLY; 1260 1261 /* 1262 * If this is the first remount to writeable state we 1263 * might have some superblock changes to update. 1264 */ 1265 if (mp->m_update_flags) { 1266 error = xfs_mount_log_sb(mp, mp->m_update_flags); 1267 if (error) { 1268 xfs_warn(mp, "failed to write sb changes"); 1269 return error; 1270 } 1271 mp->m_update_flags = 0; 1272 } 1273 1274 /* 1275 * Fill out the reserve pool if it is empty. Use the stashed 1276 * value if it is non-zero, otherwise go with the default. 1277 */ 1278 xfs_restore_resvblks(mp); 1279 xfs_log_work_queue(mp); 1280 } 1281 1282 /* rw -> ro */ 1283 if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { 1284 /* 1285 * Before we sync the metadata, we need to free up the reserve 1286 * block pool so that the used block count in the superblock on 1287 * disk is correct at the end of the remount. Stash the current 1288 * reserve pool size so that if we get remounted rw, we can 1289 * return it to the same size. 1290 */ 1291 xfs_save_resvblks(mp); 1292 xfs_quiesce_attr(mp); 1293 mp->m_flags |= XFS_MOUNT_RDONLY; 1294 } 1295 1296 return 0; 1297 } 1298 1299 /* 1300 * Second stage of a freeze. The data is already frozen so we only 1301 * need to take care of the metadata. Once that's done write a dummy 1302 * record to dirty the log in case of a crash while frozen. 1303 */ 1304 STATIC int 1305 xfs_fs_freeze( 1306 struct super_block *sb) 1307 { 1308 struct xfs_mount *mp = XFS_M(sb); 1309 1310 xfs_save_resvblks(mp); 1311 xfs_quiesce_attr(mp); 1312 return -xfs_fs_log_dummy(mp); 1313 } 1314 1315 STATIC int 1316 xfs_fs_unfreeze( 1317 struct super_block *sb) 1318 { 1319 struct xfs_mount *mp = XFS_M(sb); 1320 1321 xfs_restore_resvblks(mp); 1322 xfs_log_work_queue(mp); 1323 return 0; 1324 } 1325 1326 STATIC int 1327 xfs_fs_show_options( 1328 struct seq_file *m, 1329 struct dentry *root) 1330 { 1331 return -xfs_showargs(XFS_M(root->d_sb), m); 1332 } 1333 1334 /* 1335 * This function fills in xfs_mount_t fields based on mount args. 1336 * Note: the superblock _has_ now been read in. 1337 */ 1338 STATIC int 1339 xfs_finish_flags( 1340 struct xfs_mount *mp) 1341 { 1342 int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); 1343 1344 /* Fail a mount where the logbuf is smaller than the log stripe */ 1345 if (xfs_sb_version_haslogv2(&mp->m_sb)) { 1346 if (mp->m_logbsize <= 0 && 1347 mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { 1348 mp->m_logbsize = mp->m_sb.sb_logsunit; 1349 } else if (mp->m_logbsize > 0 && 1350 mp->m_logbsize < mp->m_sb.sb_logsunit) { 1351 xfs_warn(mp, 1352 "logbuf size must be greater than or equal to log stripe size"); 1353 return XFS_ERROR(EINVAL); 1354 } 1355 } else { 1356 /* Fail a mount if the logbuf is larger than 32K */ 1357 if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { 1358 xfs_warn(mp, 1359 "logbuf size for version 1 logs must be 16K or 32K"); 1360 return XFS_ERROR(EINVAL); 1361 } 1362 } 1363 1364 /* 1365 * V5 filesystems always use attr2 format for attributes. 1366 */ 1367 if (xfs_sb_version_hascrc(&mp->m_sb) && 1368 (mp->m_flags & XFS_MOUNT_NOATTR2)) { 1369 xfs_warn(mp, 1370 "Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.", 1371 MNTOPT_NOATTR2, MNTOPT_ATTR2); 1372 return XFS_ERROR(EINVAL); 1373 } 1374 1375 /* 1376 * mkfs'ed attr2 will turn on attr2 mount unless explicitly 1377 * told by noattr2 to turn it off 1378 */ 1379 if (xfs_sb_version_hasattr2(&mp->m_sb) && 1380 !(mp->m_flags & XFS_MOUNT_NOATTR2)) 1381 mp->m_flags |= XFS_MOUNT_ATTR2; 1382 1383 /* 1384 * prohibit r/w mounts of read-only filesystems 1385 */ 1386 if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { 1387 xfs_warn(mp, 1388 "cannot mount a read-only filesystem as read-write"); 1389 return XFS_ERROR(EROFS); 1390 } 1391 1392 if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && 1393 (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && 1394 !xfs_sb_version_has_pquotino(&mp->m_sb)) { 1395 xfs_warn(mp, 1396 "Super block does not support project and group quota together"); 1397 return XFS_ERROR(EINVAL); 1398 } 1399 1400 return 0; 1401 } 1402 1403 STATIC int 1404 xfs_fs_fill_super( 1405 struct super_block *sb, 1406 void *data, 1407 int silent) 1408 { 1409 struct inode *root; 1410 struct xfs_mount *mp = NULL; 1411 int flags = 0, error = ENOMEM; 1412 1413 mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); 1414 if (!mp) 1415 goto out; 1416 1417 spin_lock_init(&mp->m_sb_lock); 1418 mutex_init(&mp->m_growlock); 1419 atomic_set(&mp->m_active_trans, 0); 1420 INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); 1421 INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); 1422 1423 mp->m_super = sb; 1424 sb->s_fs_info = mp; 1425 1426 error = xfs_parseargs(mp, (char *)data); 1427 if (error) 1428 goto out_free_fsname; 1429 1430 sb_min_blocksize(sb, BBSIZE); 1431 sb->s_xattr = xfs_xattr_handlers; 1432 sb->s_export_op = &xfs_export_operations; 1433 #ifdef CONFIG_XFS_QUOTA 1434 sb->s_qcop = &xfs_quotactl_operations; 1435 #endif 1436 sb->s_op = &xfs_super_operations; 1437 1438 if (silent) 1439 flags |= XFS_MFSI_QUIET; 1440 1441 error = xfs_open_devices(mp); 1442 if (error) 1443 goto out_free_fsname; 1444 1445 error = xfs_init_mount_workqueues(mp); 1446 if (error) 1447 goto out_close_devices; 1448 1449 error = xfs_icsb_init_counters(mp); 1450 if (error) 1451 goto out_destroy_workqueues; 1452 1453 error = xfs_readsb(mp, flags); 1454 if (error) 1455 goto out_destroy_counters; 1456 1457 error = xfs_finish_flags(mp); 1458 if (error) 1459 goto out_free_sb; 1460 1461 error = xfs_setup_devices(mp); 1462 if (error) 1463 goto out_free_sb; 1464 1465 error = xfs_filestream_mount(mp); 1466 if (error) 1467 goto out_free_sb; 1468 1469 /* 1470 * we must configure the block size in the superblock before we run the 1471 * full mount process as the mount process can lookup and cache inodes. 1472 */ 1473 sb->s_magic = XFS_SB_MAGIC; 1474 sb->s_blocksize = mp->m_sb.sb_blocksize; 1475 sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; 1476 sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); 1477 sb->s_max_links = XFS_MAXLINK; 1478 sb->s_time_gran = 1; 1479 set_posix_acl_flag(sb); 1480 1481 /* version 5 superblocks support inode version counters. */ 1482 if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) 1483 sb->s_flags |= MS_I_VERSION; 1484 1485 error = xfs_mountfs(mp); 1486 if (error) 1487 goto out_filestream_unmount; 1488 1489 root = igrab(VFS_I(mp->m_rootip)); 1490 if (!root) { 1491 error = ENOENT; 1492 goto out_unmount; 1493 } 1494 if (is_bad_inode(root)) { 1495 error = EINVAL; 1496 goto out_unmount; 1497 } 1498 sb->s_root = d_make_root(root); 1499 if (!sb->s_root) { 1500 error = ENOMEM; 1501 goto out_unmount; 1502 } 1503 1504 return 0; 1505 1506 out_filestream_unmount: 1507 xfs_filestream_unmount(mp); 1508 out_free_sb: 1509 xfs_freesb(mp); 1510 out_destroy_counters: 1511 xfs_icsb_destroy_counters(mp); 1512 out_destroy_workqueues: 1513 xfs_destroy_mount_workqueues(mp); 1514 out_close_devices: 1515 xfs_close_devices(mp); 1516 out_free_fsname: 1517 xfs_free_fsname(mp); 1518 kfree(mp); 1519 out: 1520 return -error; 1521 1522 out_unmount: 1523 xfs_filestream_unmount(mp); 1524 xfs_unmountfs(mp); 1525 goto out_free_sb; 1526 } 1527 1528 STATIC struct dentry * 1529 xfs_fs_mount( 1530 struct file_system_type *fs_type, 1531 int flags, 1532 const char *dev_name, 1533 void *data) 1534 { 1535 return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); 1536 } 1537 1538 static long 1539 xfs_fs_nr_cached_objects( 1540 struct super_block *sb, 1541 int nid) 1542 { 1543 return xfs_reclaim_inodes_count(XFS_M(sb)); 1544 } 1545 1546 static long 1547 xfs_fs_free_cached_objects( 1548 struct super_block *sb, 1549 long nr_to_scan, 1550 int nid) 1551 { 1552 return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); 1553 } 1554 1555 static const struct super_operations xfs_super_operations = { 1556 .alloc_inode = xfs_fs_alloc_inode, 1557 .destroy_inode = xfs_fs_destroy_inode, 1558 .evict_inode = xfs_fs_evict_inode, 1559 .drop_inode = xfs_fs_drop_inode, 1560 .put_super = xfs_fs_put_super, 1561 .sync_fs = xfs_fs_sync_fs, 1562 .freeze_fs = xfs_fs_freeze, 1563 .unfreeze_fs = xfs_fs_unfreeze, 1564 .statfs = xfs_fs_statfs, 1565 .remount_fs = xfs_fs_remount, 1566 .show_options = xfs_fs_show_options, 1567 .nr_cached_objects = xfs_fs_nr_cached_objects, 1568 .free_cached_objects = xfs_fs_free_cached_objects, 1569 }; 1570 1571 static struct file_system_type xfs_fs_type = { 1572 .owner = THIS_MODULE, 1573 .name = "xfs", 1574 .mount = xfs_fs_mount, 1575 .kill_sb = kill_block_super, 1576 .fs_flags = FS_REQUIRES_DEV, 1577 }; 1578 MODULE_ALIAS_FS("xfs"); 1579 1580 STATIC int __init 1581 xfs_init_zones(void) 1582 { 1583 1584 xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); 1585 if (!xfs_ioend_zone) 1586 goto out; 1587 1588 xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, 1589 xfs_ioend_zone); 1590 if (!xfs_ioend_pool) 1591 goto out_destroy_ioend_zone; 1592 1593 xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), 1594 "xfs_log_ticket"); 1595 if (!xfs_log_ticket_zone) 1596 goto out_destroy_ioend_pool; 1597 1598 xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), 1599 "xfs_bmap_free_item"); 1600 if (!xfs_bmap_free_item_zone) 1601 goto out_destroy_log_ticket_zone; 1602 1603 xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), 1604 "xfs_btree_cur"); 1605 if (!xfs_btree_cur_zone) 1606 goto out_destroy_bmap_free_item_zone; 1607 1608 xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), 1609 "xfs_da_state"); 1610 if (!xfs_da_state_zone) 1611 goto out_destroy_btree_cur_zone; 1612 1613 xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); 1614 if (!xfs_ifork_zone) 1615 goto out_destroy_da_state_zone; 1616 1617 xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); 1618 if (!xfs_trans_zone) 1619 goto out_destroy_ifork_zone; 1620 1621 xfs_log_item_desc_zone = 1622 kmem_zone_init(sizeof(struct xfs_log_item_desc), 1623 "xfs_log_item_desc"); 1624 if (!xfs_log_item_desc_zone) 1625 goto out_destroy_trans_zone; 1626 1627 /* 1628 * The size of the zone allocated buf log item is the maximum 1629 * size possible under XFS. This wastes a little bit of memory, 1630 * but it is much faster. 1631 */ 1632 xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), 1633 "xfs_buf_item"); 1634 if (!xfs_buf_item_zone) 1635 goto out_destroy_log_item_desc_zone; 1636 1637 xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + 1638 ((XFS_EFD_MAX_FAST_EXTENTS - 1) * 1639 sizeof(xfs_extent_t))), "xfs_efd_item"); 1640 if (!xfs_efd_zone) 1641 goto out_destroy_buf_item_zone; 1642 1643 xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + 1644 ((XFS_EFI_MAX_FAST_EXTENTS - 1) * 1645 sizeof(xfs_extent_t))), "xfs_efi_item"); 1646 if (!xfs_efi_zone) 1647 goto out_destroy_efd_zone; 1648 1649 xfs_inode_zone = 1650 kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", 1651 KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD, 1652 xfs_fs_inode_init_once); 1653 if (!xfs_inode_zone) 1654 goto out_destroy_efi_zone; 1655 1656 xfs_ili_zone = 1657 kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", 1658 KM_ZONE_SPREAD, NULL); 1659 if (!xfs_ili_zone) 1660 goto out_destroy_inode_zone; 1661 xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), 1662 "xfs_icr"); 1663 if (!xfs_icreate_zone) 1664 goto out_destroy_ili_zone; 1665 1666 return 0; 1667 1668 out_destroy_ili_zone: 1669 kmem_zone_destroy(xfs_ili_zone); 1670 out_destroy_inode_zone: 1671 kmem_zone_destroy(xfs_inode_zone); 1672 out_destroy_efi_zone: 1673 kmem_zone_destroy(xfs_efi_zone); 1674 out_destroy_efd_zone: 1675 kmem_zone_destroy(xfs_efd_zone); 1676 out_destroy_buf_item_zone: 1677 kmem_zone_destroy(xfs_buf_item_zone); 1678 out_destroy_log_item_desc_zone: 1679 kmem_zone_destroy(xfs_log_item_desc_zone); 1680 out_destroy_trans_zone: 1681 kmem_zone_destroy(xfs_trans_zone); 1682 out_destroy_ifork_zone: 1683 kmem_zone_destroy(xfs_ifork_zone); 1684 out_destroy_da_state_zone: 1685 kmem_zone_destroy(xfs_da_state_zone); 1686 out_destroy_btree_cur_zone: 1687 kmem_zone_destroy(xfs_btree_cur_zone); 1688 out_destroy_bmap_free_item_zone: 1689 kmem_zone_destroy(xfs_bmap_free_item_zone); 1690 out_destroy_log_ticket_zone: 1691 kmem_zone_destroy(xfs_log_ticket_zone); 1692 out_destroy_ioend_pool: 1693 mempool_destroy(xfs_ioend_pool); 1694 out_destroy_ioend_zone: 1695 kmem_zone_destroy(xfs_ioend_zone); 1696 out: 1697 return -ENOMEM; 1698 } 1699 1700 STATIC void 1701 xfs_destroy_zones(void) 1702 { 1703 /* 1704 * Make sure all delayed rcu free are flushed before we 1705 * destroy caches. 1706 */ 1707 rcu_barrier(); 1708 kmem_zone_destroy(xfs_icreate_zone); 1709 kmem_zone_destroy(xfs_ili_zone); 1710 kmem_zone_destroy(xfs_inode_zone); 1711 kmem_zone_destroy(xfs_efi_zone); 1712 kmem_zone_destroy(xfs_efd_zone); 1713 kmem_zone_destroy(xfs_buf_item_zone); 1714 kmem_zone_destroy(xfs_log_item_desc_zone); 1715 kmem_zone_destroy(xfs_trans_zone); 1716 kmem_zone_destroy(xfs_ifork_zone); 1717 kmem_zone_destroy(xfs_da_state_zone); 1718 kmem_zone_destroy(xfs_btree_cur_zone); 1719 kmem_zone_destroy(xfs_bmap_free_item_zone); 1720 kmem_zone_destroy(xfs_log_ticket_zone); 1721 mempool_destroy(xfs_ioend_pool); 1722 kmem_zone_destroy(xfs_ioend_zone); 1723 1724 } 1725 1726 STATIC int __init 1727 xfs_init_workqueues(void) 1728 { 1729 /* 1730 * The allocation workqueue can be used in memory reclaim situations 1731 * (writepage path), and parallelism is only limited by the number of 1732 * AGs in all the filesystems mounted. Hence use the default large 1733 * max_active value for this workqueue. 1734 */ 1735 xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); 1736 if (!xfs_alloc_wq) 1737 return -ENOMEM; 1738 1739 return 0; 1740 } 1741 1742 STATIC void 1743 xfs_destroy_workqueues(void) 1744 { 1745 destroy_workqueue(xfs_alloc_wq); 1746 } 1747 1748 STATIC int __init 1749 init_xfs_fs(void) 1750 { 1751 int error; 1752 1753 printk(KERN_INFO XFS_VERSION_STRING " with " 1754 XFS_BUILD_OPTIONS " enabled\n"); 1755 1756 xfs_dir_startup(); 1757 1758 error = xfs_init_zones(); 1759 if (error) 1760 goto out; 1761 1762 error = xfs_init_workqueues(); 1763 if (error) 1764 goto out_destroy_zones; 1765 1766 error = xfs_mru_cache_init(); 1767 if (error) 1768 goto out_destroy_wq; 1769 1770 error = xfs_filestream_init(); 1771 if (error) 1772 goto out_mru_cache_uninit; 1773 1774 error = xfs_buf_init(); 1775 if (error) 1776 goto out_filestream_uninit; 1777 1778 error = xfs_init_procfs(); 1779 if (error) 1780 goto out_buf_terminate; 1781 1782 error = xfs_sysctl_register(); 1783 if (error) 1784 goto out_cleanup_procfs; 1785 1786 error = xfs_qm_init(); 1787 if (error) 1788 goto out_sysctl_unregister; 1789 1790 error = register_filesystem(&xfs_fs_type); 1791 if (error) 1792 goto out_qm_exit; 1793 return 0; 1794 1795 out_qm_exit: 1796 xfs_qm_exit(); 1797 out_sysctl_unregister: 1798 xfs_sysctl_unregister(); 1799 out_cleanup_procfs: 1800 xfs_cleanup_procfs(); 1801 out_buf_terminate: 1802 xfs_buf_terminate(); 1803 out_filestream_uninit: 1804 xfs_filestream_uninit(); 1805 out_mru_cache_uninit: 1806 xfs_mru_cache_uninit(); 1807 out_destroy_wq: 1808 xfs_destroy_workqueues(); 1809 out_destroy_zones: 1810 xfs_destroy_zones(); 1811 out: 1812 return error; 1813 } 1814 1815 STATIC void __exit 1816 exit_xfs_fs(void) 1817 { 1818 xfs_qm_exit(); 1819 unregister_filesystem(&xfs_fs_type); 1820 xfs_sysctl_unregister(); 1821 xfs_cleanup_procfs(); 1822 xfs_buf_terminate(); 1823 xfs_filestream_uninit(); 1824 xfs_mru_cache_uninit(); 1825 xfs_destroy_workqueues(); 1826 xfs_destroy_zones(); 1827 } 1828 1829 module_init(init_xfs_fs); 1830 module_exit(exit_xfs_fs); 1831 1832 MODULE_AUTHOR("Silicon Graphics, Inc."); 1833 MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); 1834 MODULE_LICENSE("GPL"); 1835